利用新的核函数对如下非线性椭圆型方程 △↓·(A(x)△↓y)+q(x)f(y)=e(x),x∈Ω 建立了若干新的振动准则,其中Ω是Rn中外区域。所得结果比现有的结论有更高的一般性,并得到解的零点分布的信息。
By means of a new technique based on a class of functions H(r,s,l), new oscillation criteria are established for the second order nonlinear elliptic differential equation △↓(A(x)△↓y)+q(x)f(y)=e(x),x∈Ω where Ω is an exterior domain in R^N. Our results have higher general than existing conclusions.Infor-matiabout the distribution of the zero of solutions is also obtained.